Delta is a mutated strain of the new coronavirus.
Delta is a mutated strain of the new coronavirus. It was first discovered in India in October 2020. In May 2021, the WHO named B.1.617.2, the new coronavirus mutant strain first discovered in India, as the "Delta" variant. The variant has been identified as one of the drivers of India's second wave.
The Delta variant was named by B.1.617.2, the variant strain of the new coronavirus first discovered in India in May 2021. The variant has been identified as one of the drivers of India's second wave of the pandemic, which ravaged parts of the country earlier this year.
Delta’s characteristics:
1. Stronger communication power.
The infectivity and transmissibility of the "Delta" mutant virus have been significantly enhanced, especially the incubation period or the passage interval has been shortened. It has been transmitted to five or six generations in just 10 days, and the spread of the virus is accelerating. .
2. High viral load.
Compared with people infected with the "Alpha" variant strain first discovered in the UK, people infected with the "Delta" variant have twice the risk of hospitalization. The patient's CT value is very low. The lower the CT value, the higher the viral load in the body, and the longer it takes for the patient's nucleic acid to turn negative.
3. There may be immune escape, but the vaccine still has a protective effect.
The study said that compared with unvaccinated cases, vaccinated cases had a shorter time from diagnosis to antibody positivity, higher CT values, and shorter hospitalization time.